Jurors on Friday cleared Elon Musk of liability for investors' losses in a fraud trial over 2018 tweets falsely claiming that he had funding in place to take Tesla private.

The tweets sent the Tesla share price on a rollercoaster ride, and Musk was sued by shareholders who said the tycoon acted recklessly in an effort to squeeze investors who had bet against the company.

Jurors deliberated for barely two hours before returning to the San Francisco courtroom to say they unanimously agreed that neither Musk nor the Tesla board perpetrated fraud with the tweets and in their aftermath.

"Thank goodness, the wisdom of the people has prevailed!" tweeted Musk, who had tried but failed to get the trial moved to Texas on the grounds that jurors in California would be biased against him.

"I am deeply appreciative of the jury's unanimous finding of innocence in the Tesla 420 take-private case."

Attorney Nicholas Porritt, who represents Glen Littleton and other investors in Tesla, had argued in court that the case was about making sure the rich and powerful have to abide by the same stock market rules as everyone else.

"Elon Musk published tweets that were false with reckless disregard as to their truth," Porritt told the panel of nine jurors during closing arguments.

Porritt pointed to expert testimony estimating that Musk's claim about funding, which turned out not to be true, cost investors billions of dollars overall and that Musk and the Tesla board should be made to pay damages.

But Musk attorney Alex Spiro successfully countered that the billionaire may have erred on wording in a hasty tweet, but that he did not set out to deceive anyone.

Spiro also portrayed the mercurial entrepreneur, who now owns Twitter, as having had a troubled childhood and having come to the United States as a poor youth chasing dreams.

Musk testified during three days on the witness stand that his 2018 tweet about taking Tesla private at $420 a share was no joke and that Saudi Arabia's sovereign wealth fund was serious about helping him do it. (AFP)